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oss-fuzz: move linker arg to fix coverage-build 

The order of the add_project_link_arguments calls impacts which
arguments are placed between --start-group and --end-group.
OSS-Fuzz coverage builds seem to just add these to CFLAGS:
-fprofile-instr-generate -fcoverage-mapping pthread -Wl,--no-as-needed
-Wl,-ldl -Wl,-lm Wno-unused-command-line-argument

The -Wl,-ldl flag that is enough to shift the fork_fuzz.ld linker-script
back into the linker group. Move the linker-script meson call before the
other calls to make sure the flag is placed correctly.

Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Message-Id: <20200909220516.614222-1-alxndr@bu.edu>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Alexander Bulekov 2020-09-09 18:05:16 -04:00 committed by Paolo Bonzini
parent 6e01884c36
commit ff9ed62b90
1 changed files with 8 additions and 7 deletions
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15
meson.build
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@ -54,6 +54,14 @@ configure_file(input: files('scripts/ninjatool.py'),
# Compiler flags #
##################
# Specify linker-script with add_project_link_arguments so that it is not placed
# within a linker --start-group/--end-group pair
if 'CONFIG_FUZZ' in config_host
add_project_link_arguments(['-Wl,-T,',
(meson.current_source_dir() / 'tests/qtest/fuzz/fork_fuzz.ld')],
native: false, language: ['c', 'cpp', 'objc'])
endif
add_project_arguments(config_host['QEMU_CFLAGS'].split(),
native: false, language: ['c', 'objc'])
add_project_arguments(config_host['QEMU_CXXFLAGS'].split(),
@ -63,13 +71,6 @@ add_project_link_arguments(config_host['QEMU_LDFLAGS'].split(),
add_project_arguments(config_host['QEMU_INCLUDES'].split(),
language: ['c', 'cpp', 'objc'])
# Specify linker-script with add_project_link_arguments so that it is not placed
# within a linker --start-group/--end-group pair
if 'CONFIG_FUZZ' in config_host
add_project_link_arguments(['-Wl,-T,',
(meson.current_source_dir() / 'tests/qtest/fuzz/fork_fuzz.ld')],
native: false, language: ['c', 'cpp', 'objc'])
endif
link_language = meson.get_external_property('link_language', 'cpp')
if link_language == 'cpp'